Organic Chemistry: Alpha Alkylation and Stork Reaction

What is the primary role of LDA in alpha alkylation reactions?

• To stabilize the reaction intermediate

• To deprotonate the alpha carbon

• To act as a nucleophile

• To provide a leaving group

Which type of alkyl halide is preferred in SN2 reactions during alpha alkylation?

• Tertiary halide

• Secondary halide

• Methyl or primary halide

• Aromatic halide

What is the significance of using low temperatures in the formation of kinetic enolates?

• It favors the formation of the more substituted enolate

• It favors the formation of the less substituted enolate

• It prevents side reactions

• It increases the reaction rate

In the Stork reaction, what is the enamine used as?

• An electrophile

• A nucleophile

• A solvent

• A catalyst

What is the main difference between an enolate and an enamine in terms of nucleophilicity?

• Both have equal nucleophilicity

• Neither acts as a nucleophile

• Enolates are stronger nucleophiles

• Enamines are stronger nucleophiles

What is a key advantage of the Stork reaction over the LDA method?

• It forms a more stable product

• It uses harsher conditions

• It is faster

• It requires milder conditions

What happens to the enamine after it is used in the Stork reaction?

• It decomposes

• It forms a stable complex

• It remains unchanged

• It is converted back to a ketone

Why is the Stork reaction considered more complex than the LDA method?

• It uses more reagents

• It requires higher temperatures

• It forms more by-products

• It involves more steps

What is the role of H3O+ in the Stork reaction?

• To stabilize the enamine

• To convert the enamine back to a ketone

• To deprotonate the enamine

• To act as a nucleophile

Which of the following is NOT a characteristic of the Stork reaction?

• It is reversible

• It uses a secondary amine

• It forms an enamine

• It requires harsh conditions